Levelflex M FMP40 - Process Centre Of Excellence.

Technical data Levelflex M FMP40 with HART/4...20 mA
10 Technical data
10.1 Additional technical data
10.1.1 Input
Measured variable The measured variable is the distance between a reference point (see Fig. on → ä 16) and the
product surface.
Subject to the input empty distance (E, see Fig. on → ä 104), the level is calculated.
Alternatively, the level can be converted by means of linearisation (32 points) into other variables
(volume, mass).
10.1.2 Output
Output signal 4…20 mA with HART protocol
Signal on alarm Error information can be accessed via the following interfaces:
•Local display:
– Error symbol (→ ä 45)
– Plain text display
• Current output, signal on error can be selected (e.g. according to NAMUR recommendation NE
43).
• Digital interface
Linearization The Levelflex M linearisation function enables conversion of the measured value into any desired
length or volume units and mass or %. Linearisation tables for volume calculation in cylindrical tanks
are pre-programmed. Any other tables from up to 32 value pairs can be input manually or semiautomatically.
The creation of a linearisation table with the ToF Tool or FieldCare is particularly convenient.
Reference operating
conditions
10.1.3 Performance characteristics
• temperature = +20 °C (68 °F) ±5 °C (9 °F)
• pressure = 1013 mbar abs. (14.7 psia) ±20 mbar (0.3 psi)
• humidity = 65 % ±20%
• Reflection factor ≥ 0.8 (surface of the water for coax probe, metal plate for rod and rope probe
with min. 1 m ∅)
• Flange for rod or rope probe ≥ 30 cm ∅
• Distance to obstructions ≥ 1m
Maximum measured error Is in Function group "basic setup" (00) starting from → ä 55.
Resolution • Digital: 1 mm
• analog: 0.03 % of the measuring range
Reaction time The reaction time is dependent on the configuration.
Shortest time:
• 2-wire electronics: 1 s
• 4-wire electronics: 0.7 s
94 Endress + Hauser